<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="./vuev2.5.21.js"></script>
</head>
<body>
    <div id="app">
      <my-com></my-com>
    </div>
    <script>
      Vue.component('myCom',{template:'<div>我是组件2</div>'})
      new Vue({
        el:"#app",
        data:{},
        methods:{}
      })
    </script>
</body>
</html>